USA UNS G10550
AISI
American Iron and Steel Institute
1055
Corresponding Standard ASTM A29/A29M-2020
General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
Classification Carbon Steel
Chemical Element Composition Content (%)
Component C Mn P S
Minimum Value 0.5 0.6 - -
Maximum Value 0.6 0.9 0.04 0.05
1 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF GOST SS BS EN/BS
55 U20552 S55C S55C SM55C 1055
(ASTM)
G10550 C55E4 C55E
Ck55
1.1203 C55E
XC55
55 1665 C55E
070M55
2 Approximate Comparison Table
China Japan United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB JIS ASTM ISO DIN EN/DIN NF EN/NF EN Numerical Grade GOST SS BS EN/BS
C55 S55C 1055 C55
C55E4
C55 AF70C55
C54
C55 1.0535 50
55
1655 070M55
50
En9
3 Approximate Comparison Table
Japan United States International Organization for Standardization Germany France European Standard Russia United Kingdom
JIS ASTM ISO DIN EN/DIN NF EN/NF EN Numerical Grade GOST BS EN/BS
S55C 1055 C55E4 Ck55 XC54
XC55H1
C55E 1.1203 55 070M55

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